Can I run 1” pex-b re-circulation loop with 1/2” branches to each fixture if within 10’ of 1”? Or should I run 3/4” branches to each fixture?

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I’m running a 1 inch recirculating loop to 3.5 bathrooms,. Should I run a 1/2” branches off that 1 inch line to each fixture, as they are all within 10 feet of the 1 inch line? Or, should I run 3/4” inch branches to each fixture and step down to 1/2” at the connection?
 
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wwhitney

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The former will waste less water and time. Maybe if you have an uber large tub it would be worth 3/4" just for the tub filler.

Cheers, Wayne
 
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The former will waste less water and time. Maybe if you have an uber large tub it would be worth 3/4" just for the tub filler.

Cheers, Wayne
Would there be any noticeable difference in pressure with the direct 1/2” option?
 

John Gayewski

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The pressure loss in 10' of 1/2" pipe vs 3/4" pipe isnt going to be much. If you already have low pressure and your valve causes a lot of pressure drop it could be noticeable, but in most circumstances you won't notice it.
 
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